scr.im - Don't share your email on public sites.
Clocked - Dating matches for city based millennials.
Spamty - Spamty is a web service to encrypt an email address and share it on the internet.
Humans Not Invited - CAPTCHA that filters out humans and only lets programs pass
Dateable - Bay Area’s dating site
hCaptcha - Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.